Packing ram



' Nov. 8 1938; w. ERNST 2,136,239

Filed Sept. 5/1955 NTOR ATTORNEYS Patented Nov. 8,

PACKING RAM Walter non; meme gnmen Corporation, Inc., I 'tion of Delaware Gilead, om

Wilmingto to The Hydraulic o, assignor, by Press In, bet, a corporamuses. stptembel' s,- 1935, SeriafNo. 39,311

2 Claims. This. invention rel pressure rams.

'It is-the object of this invention to avoid the high pressure in the wear; and leakage andrequires frequent replacemen It is an object of this invention to provide a am with metallic piston rings, such as cast iron, which is reasonably oil-tight, and to remove any leakage that gets past the rings by collecting the leakage in a groove and draining it from the gravity or by asuction line pressure never reaches'the packing because'the collecting groove carries atmospheric pressure only 1 Referring to the drawing: Figure 1 is a section through a cylinderand the packing construction of this invention. Figure is a section on the line 2-4 01' Figure 1 looking in the direction 01' the arrows.

Referring to the drawing in detail, ,I designates a ram having cast iron piston rings 2 mounted in o the grooves 3, which prevent the major portion of the leakage of the fluid under pressure in the chamber 4 of the piston 5.

Such fluid that does leak'pastthe piston rings 2 and along the surface '6 of the ram I is collected in the annular, triangular-shaped groove 1 in the cylinder 5. This groove is connectedwith an outlet port 8 that is connected to the atmos-' phere so that theleakage can drain through 8 by gravity. One or more oi such ports 8 are provided.

Forming the rear wall .of the space 'I is a packing ring 9 and behind it is a packing It held 'in position by the packing gland ll, whichin Y turn is retained in its position'by the cap screws I2. The ring 9 and packing It thus perform a wiping action to keep the ram dry. Thus the high pressure never reaches the-packing Ill be cause this high pressure fluid exhausted through theport 8 collecting groove 1. v

Insome instances it is desira exhaust the fluid collecting in -the groove 1, by attaching to the port lpapump ll which is con nected thereto by the line I4 and which discharges the fluid thus collected through the limit.

ble' t namely It will be understood that I desire to comprehendv within my invention such modifications as ates to packing for high.

tions and uses.

Having thus fully what I claim as new i Letters Patent, is

1. In combination, bore, a plunger recipr may be necessary to adapt it to varying condidescribed my invention, and desire to secure by cylinder with a cylinder ocable therein, leakage inipeding piston rings on said plunger engaging the walls of said cylinder communicating with said ately adjacent the outlet to withdraw fluid i'rompressing element beyond said pressure fluid leakage between the plunger and I the cylinder bore past said leakage in ton rings will packing, said engaging said thereon into for positively exh lected therein.

be removed through said and port before reaching and damaging said member snugly to divert fluidannular wiping plunger whereby said annular through said port and thereby to assist in venting leakage fluid fromreaching said driven means connected to austing therefrom the bore, an annular recess cylinder bore immediof said plunger there- M ng P18- recess recess for removal .2. In combination, a cylinder with a cylinder bore, a plunger reciprocable therein, leakage 1m? peding piston ri ngs on said walls of said cylinder bor I communicating with said cylinder bore immedi-' ately adjacent the outlet of from, a'port arranged to plunger engaging the an annular recess said plunger therewithdraw fluid from said recess, an annular wiping member surrounding and engaging said plun recess .on the; Opposite side ger adjacent said cylinder bore, a packing beyond said annular wiping member e annular member,

and

compressing element be by pressure fluid leakage and the cylinder and port before packing, said ngaging said plunger and said an adjustable. pa k yond said packing, wherebore past said leakage impeding piston rings will be removed through said recess reaching. and damaging; said annular member consisting of a stationary ring of relatively incompressible 1118-,

terial snugly engaging said plunger, and said packing consisting of relatively compressible material' whereby to cause said annular member to divert the recess for to assist in preve ing said packing.

nting fluid on the plunger into the annular removal through the port and thereby leakage fluid from reach- WALTER ERNST.

packing.. saidportthereoi' i'rom said between the plunger 

